#!/usr/bin/node


const user = {
  name:'shanggege',
  age:19,
  qq:'2568155685'
};
const log = console.log;
log('name:%s',user.name);
log('age:%d',user.age);
log('JSON:%j',user);

log('qq:%s',user.qq);
log('qq:',user.qq);
log(`qq:${user.qq}`);

console.error('Error! something wrong!');
